Programming Linux Anti-Reversing Techniques
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Programming Linux Anti-Reversing Techniques

About the Book

Unlike many reverse engineering books, Programming Linux Anti-Reversing Techniques provides working code so that the reader can better understand how anti reverse engineering techniques are generated and analyzed. The code starts off as a very straight forward C bind shell that gets modified throughout the book. Each chapter shows the reader how a reverse engineer might look at a binary and how to frustrate that analysis.

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    • C and C++
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Table of Contents

  • Preface
    • Why Read This Book?
    • Topics Not Covered
    • Prerequisites
    • Code and Command Output
  • Chapter 1: Introductions
    • Introducing “Trouble”
    • Using CMake
    • The Code
    • Compiling
    • Executing
    • Accessing the Shell
  • Chapter 2: Compiler Options
    • -g
      • Recovering the Bind Shell Password with Hexdump
      • Recovering the Bind Shell Password with GDB
      • The Debugging Information in IDA
      • Removing the Debugging Information
      • Case Study: XOR DDOS
    • -s
      • SYMTAB vs. DYNSYM
      • Finding the Bind Shell Password Using .symtab
      • Case Study: The FILE Symbol
      • Examing Trouble After -s
    • -fvisibility
      • Looking at FUNC symbols
      • Hiding FUNC symbols
    • -O
      • Corrected Block Tiny Encryption Algorithm (XXTEA)
      • -Os
      • -O3
      • -funroll-loops
    • -static
      • Resolving Functions at Runtime
      • ltrace
      • LD_PRELOAD
      • Using musl
  • Chapter 3: File Format Hacks
    • The Strip Utility
    • Removing the Section Headers Table
    • Little Endian or Big Endian?
    • The Sections Are a Lie
      • Flipping the Executable Bit
      • Lying with .init
      • Hiding the Entry Point
    • Mixing the Symbols
  • Chapter 4: Fighting Off String Analysis
    • Code Reorganization
    • Stack Strings
    • XOR Stack String
    • Function Encryption
      • Computing the Function’s Size Using a Linker Script
      • Decryption Logic
      • Encryption Logic
    • Creating a Cryptor
      • Implementing the Cryptor
      • Analyzing the Cryptor
  • Chapter 5: Obstructing Code Flow Analysis
    • Indirect Function Calls
    • Signals
    • Early Return
    • Jump Over an Invalid Byte
    • Jump! Jump!
    • Always Follow the Conditional
    • Overlapping Instructions
  • Chapter 6: Evading the Debugger
    • Trace Me
    • Trapping the Debugger
    • Becoming Attached
    • madvise
    • prctl
    • Detection Before main()
    • Computing Function Checksums
  • Conclusion: All That We Fall For
  • Notes

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